Bandsaw bowl preparation

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Re: Bandsaw bowl preparation

Postby Robin Fawcett » Tue Jun 23, 2009 10:30 pm

Daniel wrote: I first train myself to axe out the blanks.


Yes, good . . . then try bandsaws, chainsaws and other horrible time-saving devices.
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Re: Bandsaw bowl preparation

Postby Bertie » Fri Jun 26, 2009 4:44 pm

Had a long friendship with a certain well known stick back chair maker who "despised" power tools - mind you the bandsaw was not included in that and as he was getting on a bit nor was the strimmer - petrol driven of course as he lived in the middle of a field, neither was the tractor, as how else was he to move heavy wood around.
Records show that the 13,000 odd norman forts built around the uk were done by local labour, each labourer was expected to move 2 tons of earth with a wooden spade and doubtless wheelbarrow, per hour . They didnt live long.
Wonder what they would have said to a jcb - sorry chum its not about the job, its about how its done.
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Re: Bandsaw bowl preparation

Postby gavin » Sat Jun 27, 2009 11:19 am

Yep, I have absolutely now worked this out. I fitted a 12 mm blade, which made a BIG difference to getting round a circle of 180 mm diameter. Now I don't have to axe out blanks, I am turning a lot more bowls. :D

Decide how deep you want your bowl. I have set the bandsaw fence here to 60 mm, so my bowl will be approx 55 mm deep when finished.
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Now offer up your blank to the blade...
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And cut through...
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Then scribe a circle...
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Now tilt the bandsaw table. I have selected 30 degrees here...
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Place the blank on the tilted table...
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Now rotate the blank around the blade...
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This will leave conical-shaped firewood waste...
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And your desired blank...
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One limitation of this approach is the throat size of your bandsaw i.e. how tall a piece of wood can you cut. My saw is a Record BS350E with 230 mm throat. So if I cross cut logs at 225 mm they will rip readily enough with a straight cut. Circular cuts ask more of your saw and you'll struggle with any thickness over 150 mm. Smaller blades e.g. 6 mm will go round tighter curves, but they can wander.

Because the top and bottom of the bowl are in the same plane, I save a lot of time mounting the work in the lathe and in truing off eccentric parts. Axing accurately is tiring.

A bandsaw like this will cost approx GBP350 or 400. You need no protective clothing or training, so it beats a chainsaw for cost to access. It does take up three-quarters of a meter of floor space. If you have a friend with a chainsaw, then a bandsaw could be a more useful item to you than a chainsaw.
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